The aim of the thesis was to evaluate the influence of maedi-visna on reproductive indicators in selected Šumava sheep breeding. Serological test ELISA was accomplished in the evaluated herd, and its results were used for comparing reproductive rates of healthy and infected ewes. Maedi-visna disease was proved in 16 out of 193 samples (8, 29 %). Statistically significant influence of maedi-visna was shown in indicators such as age of infected ewes and number of reared lambs. For other indicators (number of live birth lambs, lambs weight in 100 days, occurrence of sterility, mortality and stillborn lambs) higher success rate was observed in maedi-visna negative ewes, however these findings were not statistically significant. Maedi-visna is incurable disease and most important tool how to avoid this disease is preventive protection of the sheep breedings.

Sheep breeding is very suitable branch to be practised on the mountain. The thesis deals with sheep breeding level in chosen mountain stud. The purpose of the thesis is interpretation of quality indicators of sheep at the farm and also making financial analysis. At the close there can be found some recommended disposal how to improve enterprise efficiency.

The goal of this Diploma thesis was an analysis of the chosen factors and their influence on sheep fertility in the herd of sumava sheep. This factors were presented through the age of sheep, sheep nutrition and stress influence on the sheep fertility. For this purpose it was chosen the sumava sheep farming in herd Michlova Hut. At first this herd was introduced, than statistically described in terms of sheep fertility and in the next part there was analysis of the chosen factors. Based on these results the conclusions and the basic breeder recommendation to breeder community were deduced. The main reason for choice this topic was a growing breeder´s interest in breeder´s economy and various possibilities of the increasing sheep fertility.

The goal of this Diploma thesis was an analysis of the chosen factors and their influence on meat performance of sumava sheep. This factors were presented trough the lamb sex, change of the nutrition dose and change of the surroundings. For this purpose it was chosen the sumava sheep farming in herd Michlova Hut. At first this herd was introduced, than statistically described in terms of meat performance and in the next part there was analysis of the chosen factors. Based on these results the conclusions and the basic breeder recommendation to breeder community were deduced. The main reason for choice this topic was a growing number of sheep farming focused on meat performance and factors trough them this performance is influenced.

The purpose of my graduation theses on the theme ? sheep breending at the ecological farm? was toanalyze the level of uses properities sheep and economic indicators at the ecological farm Račín situated in mountain part of Šumava. The detail information from studies of the technical literature specialized on ecological agriculture were brought out to analyze the whole questions of sheep breending at the ecological farm Račín. Meat yield was evaluated . The evaluation of reproduction was based on four basic reproductive indexes. The weight of 100 days old sheep and the production of wool were detected by scaling. Detected values were lower in most of indexes than published indexes. This fact is connected with detected inadequacies of lairage, nutrition and breending organization. Steps were suggested to eliminate these inaquacies and to innovate the level of breending in conclusion.

Sheep breeding is nowadays a developing branch of agriculture again. There is a lot of different breed and they react distinctly on the same conditions of the enviroment. Sheep of breeds charollais, suffolk, šumavská ovce and valaška bred in similar conditions were observed in spring and autumn of years 2007 and 2008. In these seasons were taking blood samples (from {$\pm$}7{--}24) ewes and lambs and were analyzed in hematology laboratory. There were determined haemoglobin level, haematocrit indicator, erytrocytes and leucocytes levels, glucose, cholesterol, triglycerides levels, urea and plasmatic proteins, activity of ALP and GMT enzymes, phosphor, calcium, magnesium, zinc and copper levels. The main objective of this project was determine seasonal changes in observed parametres. Next objectives were determine different changes in blood parametres in different breeds and different aimes of breeds. There were recognized that all the observed breeds don`t react the same way on similar conditions. There were not provably determined seasonal changes in observed parametres, but average Hb level was higher in autumn than in spring. Urea level was conversely higher in spring season than in autumn. The demostrable fact is, that the similar conditions induce different answers not only in different breeds but also in different aimes of breeds.